BASKARAN, R K, M S VENUGOPAL, and N R MAHADEVAN. 2013. “Effect of Certain Botanicals on Biological Activity of Nuclear Polyhedrosis Virus of Tobacco Caterpillar (Spodoptera Litura)”. The Indian Journal of Agricultural Sciences 69 (3). https://epubs.icar.org.in/index.php/IJAgS/article/view/26563.